<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>

</head>
<body>
<input type="text" name="" id="data">
<button onclick="getData()">发送</button>
<div id="root">
</div>
<script>
    function getData() {
        let data = document.getElementById('data').value
        let result = ''
        data = Array.from(data)
        data.forEach(e => {
            result += (e * 1 + 5) % 10
        })
        console.log(result)
        for (let i = result.length - 1; i > 0; i--)
            root.innerHTML += result[i];
    }
</script>

</body>
</html>